package com.qf.web.controller;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * projectName:myxiaomi
 * author:LiPengChong
 * time:2024/4/15 14:03
 * description:
 */

public class BaseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");
        String methodName = request.getParameter("method");
        //反射
        try {
            Method method = this.getClass().getMethod(methodName,HttpServletRequest.class,HttpServletResponse.class);
            if (method != null) {
               String url = (String) method.invoke(this,request,response);
               if (url==null||url.trim().length()==0){
                   return;
               }
               //转发重定向
                if (url.startsWith("redirect:")){//重定向  "redirect:/index.jsp"
                    String redirectURl = url.substring(url.indexOf("/") + 1);//index.jsp
                    response.sendRedirect(redirectURl);
                }else {//转发
                    request.getRequestDispatcher(url).forward(request,response);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doGet(request, response);
    }
}


